Compounds of the formula I:
wherein
R
1
, R
2
, X and N are as defined in the specification;
E is N, CH;
A′ and A″ are terminal groups as defined in the specification.
The compounds have utility as HIV-1 protease inhibitors.
Compounds of the formula I:
wherein
R1, R2, X and N are as defined in the specification;
E is N, CH;
A′ and A″ are terminal groups as defined in the specification.
The compounds have utility as HIV-1 protease inhibitors.
Stannylcarbamate 1 proved to be a selective agent for generating organotin(IV) enolates from alpha-halo ketones. Thus, a Darzens reaction was achieved under mild and neutral conditions. The reaction took place without any side reactions and even with aliphatic alpha-halo ketones bearing enolizable alpha'-hydrogens. Various types of alpha,beta-epoxy ketones and esters were obtained in this one-pot reaction. The stereoselectivity of the reaction was influenced by changing the halogen substituent of the alpha-halo ketones and by additives. Moreover, the present method could be applied to gamma- and delta-halo ketones as enolate precursors, and five- and six-membered cyclic compounds were obtained.